feat(board): add Wireless Tag WT32-SC01 Plus (ESP32-S3, ST7796 I80)

[ayyaris]

Summary

Adds board support for the Wireless Tag WT32-SC01 Plus:

• ESP32-S3 SoC, 16 MB flash, 2 MB Quad PSRAM
• ST7796 480×320 display via native 8-bit Intel 8080 (I80) bus
• FT6336U capacitive touch controller via I2C

Files

File	Purpose
board_peripherals.yaml	I80 LCD bus + I2C bus definitions
board_devices.yaml	ST7796 LCD panel + FT6336U touch device
sdkconfig.defaults.board	PSRAM / stack constraints (see below)
setup_device.c	ST7796 init sequence via esp_lcd I80 driver

Key decisions

Touch device type: Uses type: lcd_touch / sub_type: i2c (not the deprecated lcd_touch_i2c). The deprecated type has a YAML mapping bug where i2c_addr[] is never populated from io_i2c_config.dev_addr, causing the probe loop to always target address 0x00 → ESP_ERR_INVALID_RESPONSE → reboot loop. Tracked in issue #90.

PSRAM constraints: The WT32-SC01 Plus has 2 MB Quad PSRAM, which is too small for SPIRAM_XIP_FROM_PSRAM. With XIP-from-PSRAM disabled, task stacks must remain in internal DRAM — otherwise any flash read while a task runs on a PSRAM stack triggers esp_task_stack_is_sane_cache_disabled() → panic. Tracked in issue #91.

CONFIG_SPIRAM_XIP_FROM_PSRAM=n
CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL=65536
CONFIG_FREERTOS_TASK_CREATE_ALLOW_EXT_MEM=n

Test plan

• Board boots without reboot loop
• Display initialises and renders correctly
• Touch input registers correctly

🤖 Generated with Claude Code

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[laride]

Thanks for splitting the PR!

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